Support for custom post types

Hello,

I really love your plug-in. I use it on 2 websites that I manage and it’s just brilliant. I have a problem though with a third website that I manage. It uses custom post types and the Checklist is not displayed when you write a custom post type. What can I do do have it displayed on custom post types as well?

https://ww.wp.xz.cn/plugins/pre-publish-post-checklist/